Valve



(No Model.) 2 Sheets-Sheet 1, H. E. HUNT.

VALVE N0. 555,377. Patented Feb, 25, 1896;

INVENTOR adv i: Q x

WITNESSE Q I (No Model.) 2 Sheets-Sheet 2. H. E. HUNT.

VALVE. I No. 555,377. Patented Feb, 25, 1896;

i WITNESSES INVENTOR UNITED STATES PATENT OFFICE.

HERBERT E. HUNT, OF-PITT SBURG, PENNSYLVANIA.

VA LV E SPECIFICATION forming part of Letters Patent No. 555,377, datedFebruary 25, 1896.

Application filed October 30 1895. Serial No. 567,347. No model.) i

To all whom it may concern:

Be it known that I, HERBERT E. HUNT, of Pittsburg, in-the countyofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Valves, of which the following is a full,clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specifica; tion, in which Figure 1 is a cross-section of myimproved valve, taken on the line I I of Fig. 2, looking upward. Fig. 2is a vertical central section of the valve; and Figs. 3, 4, and 5 arecrosssections on the line X X of Fig. 2, looking downwardly.

Like symbols of reference indicate like parts in each figure.

My invention relates to the class of valves, andis designed to afford afive-way disk-valve of improved construction, more especially for useupon street-cars where the air passing through the valve controls theair-braking system and also the cylinder arranged to actuate thecontroller.

In the drawings, 2 indicates the flat circular seat for the rotarydisk-valve 3, which is provided with a stem 4, and is normally heldagainst its seat by a spring 5.

6 is the supply-pipe leading from the airreservoir to the valve.

7 is the pipe leading from the valve to the braking-cylinder.

8 and 9 are the pipes leading to the opposite ends of thecontroller-actuating cylinder, and 10 and 11 are pipes leading to theopen air. Between the entrances to these pipes are bridges 12, formingseparate chambers 13, 14, 15,16 and 17. Within the chamber 13 is asupply-port 18 and an exhaust-port 19 for the brake-cylinder. Within thechamber 14 is a supply-port 20 and an exhaust-port 21 for one end of thecontroller-actuating cylinder, the corresponding ports for the other endof such cylinder being ports 22 and 23 in the chamber 16. In the chamberare two exhaust-ports 24 and 25, one for each end of thecontrolleractuating cylinder, and in the chamber 17 is an exhaust-port26 for the brake-cylinder.

The disk-valve contains supplysport 27, arranged to register withthe'port 18 and supply air to the brake-cylinder, port 28, ar-

. ranged to register with the port and supply air to one end of thecontroller-actuating cylinder, and port 29, arranged to supply air tothe other end of such cylinder and registering with the port 22 incertain positions, these being through-ports. It also containspn itsinner face three grooved or recessed ports 30, 31 and 32, the first twoserving to exhaust both ends of the controller-actuating cylinder, andthe third to exhaust the brake-cylinder.

Figs. 2 and 3 show the valve in normal position of complete release, thebrake-cylinder releasing the through-port 32 registering with the ports17 and 19, and the other cylinder being on release by the port 30,connecting the ports 21-and 24, and the port. 31, connecting ports 23and 25.

To move the car the valve-lever is turned to the left, bringing the port28 into registry with the port 20, at the same time cutting out ports 23and 24, while the brake is on partial release, all as shown in Fig. 4.To return the controller to inoperative position, the lever is moved inthe opposite direction, whereupon try, thus admitting air to the otherend of the cylinder, driving the controller-lever back to its originalposition; and still further move;

the ports 20 and 28 are thrown out of registry,

the air in the controller-actuatin g cylinder exment brings theports tothe position of Fig. I

5, wherein the ports 27 and 18 are in partial registry, admitting air tothe brake-cylinder and setting the brakes, this being the service stop.A slight further movement gives a full registry of the ports 27 and 18,giving an emergency stop.

It will be noticed that the port 291s outside of the port 26, so thatthey cannot register in the position of Fig. 5.

The advantages of my invention will be apparent to those skilled in theart, since in the single valve are contained the supply and releaseports for both the brake-cylinder and the controlleractuating cylinder,and the ports are so arranged thatone of these cylinders must be cut 0Ewhen the other is inoperation.

Many variations may be made in the form and arrangement of the parts bythe skilled ing five chambers, two chambers having exhaust-ports, andtheothers having supply and exhaust ports, and a rotary disk-valve havingport-s arranged to register therewith substan- IO tially as described.

2. A valve -having a casing provided with ports arranged to connecttwoof these chambers with a third, an a port which in a differentposition of the valve connects the remaining chambers; substantially asdescribed.

In testimony whereof I have hereunto set my hand.- HERBERT E. HUNT.

Witnesses 1 G. BYRNEs, G. I. HOLDSHIP.

five chambers, adisk-valve having grooved

